import {ref, reactive, onMounted, computed} from "vue";

export default function () {
    let sum = ref(0)

    let bigSum = computed(() => {
        return sum.value * 10
    })
    function add() {
        sum.value += 1
    }
    onMounted(() => {
        add()
    })
    //给外部提供东西
    return {sum,add,bigSum}
}

